Analysis on the Influence of Uneven Subgrade Settlement on the Stress of Pavement Structure Layer
Using the finite element software to simulate and analyze the stress characteristics of the corresponding base material when the roadbed settles,based on the analysis of the change of the stress on the base material under the combined action of different settle-ment deformation and vehicle load,the research results show that when the subgrade deforms inhomogeneously,because the tensile strength of semi-rigid base material is relatively low,the base of semi-rigid base material is subjected to large tensile stress,which is mainly caused by tensile failure.The tensile stress at the base of semi-rigid base increases with the increase of the maximum uneven settlement,which shows that the tensile stress at the base of semi-rigid base is greatly affected by the uneven deformation of sub-grade.When the uneven settlement deformation and the vehicle load act together,the force on the base material bottom is mainly the bottom tensile stress.
subgrade settlementbase materialfinite element analysisasphalt concretecement concrete
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